Reloading a scene from reality composer.

Hello, I'm setting up an ar view using scene anchors from reality composer. The scenes load perfectly fine the first time entering the AR View. When I go back to the previous screen and re-enter the AR View the app crashes before any of the scenes appear on the screen. I've tried pausing and resuming the session and am still getting the following error.

validateFunctionArguments:3536: failed assertion `Fragment Function(fsRenderShadowReceiverPlane): incorrect type of texture (MTLTextureTypeCube) bound at texture binding at index 0 (expect MTLTextureType2D) for projectiveShadowMapTexture[0].'

Any help would be very much appreciated.
Thanks